INSTALLATION
2-13
Routine maintenance
Ventilation fan and filter
The ventilator fan on the rear of the Service Monitor is fitted with a filter to prevent the ingress of
foreign matter into it. This should be inspected and cleaned at regular intervals. The procedure
for this is as follows:
Disconnect the Service Monitor from the mains supply and from any DC supply.
Remove any other connections to the Service Monitor.
WARNING
Failing to disconnect the power source before removing the filter could result in the fan
becoming switched on accidentally.
Stand the Service Monitor face down on a firm, non-scratch flat surface so that it is supported on
the front handles.† The rear of the Service Monitor, with the fan housing, should be at a safe and
accessible working height.
Remove the two M4 screws holding the fan filter to the rear of the Service Monitor and lift the
filter away.
Take the filter to a suitably ventilated location and remove as much dust and other foreign matter
as is practical. Do not wet or wash the filter.
Refit the filter to the Service Monitor, using the reverse procedure as appropriate.
If the filter is damaged or blocked, a replacement is available as part no. 35907/675.
†
If the bail arm carrying handle has been fitted, this should be positioned over
the top of the Service Monitor before standing the instrument face down,
supported on the front bumpers.
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